Table A6.

Summary of thermobarometric estimates obtained on the ultramafic materials hosted in S.Bartolo lavas. See text for details

T(°C)aDiaFoaFoaCEnΔG0I,T (kJ)log aSiO2 (0.5 wt%)log aSiO2 (3.5 wt%)P (GPa) H2O=0.5 wt%P (GPa) H2O=3.5wt%
Reaction (10)Di=1/2SiO2(liq)+1/2Ol(liq)+Wo(liq)
10800.852030.7395647.159−0.4660.008
11000.851450.7380146.372−0.4660.118
11450.851000.7346844.505−0.392−0.4670.0240.387
11800.850480.7322442.965−0.392−0.4680.2230.617
12200.849390.7296041.114−0.391−0.4690.4720.907
12600.849390.7271139.169−0.390−0.4700.7481.230
12900.849010.7253337.651−0.390−0.4700.9751.498
13050.848820.7244737.133−0.390−0.4711.0971.641
ReferencesSack & Ghiorso (1989)Sack & Ghiorso (1989)Ghiorso & Sack (1995)Ghiorso & Sack (1995)
Melt composition Table 4, an. 11: mineral compositions previously reported in Laiolo & Cigolini (2006, Table 12)
Reaction (11)Fo(sol)+SiO2=CEn
10000.746310.74245−6.230−0.394−0.4630.4580.716
11000.738010.64950−5.014−0.393−0.4660.5360.838
11300.735760.62627−3.674−0.392−0.4670.5630.879
11500.734320.61178−3.534−0.392−0.4670.5820.907
11800.732240.59137−3.392−0.391−0.4680.6120.951
12000.730900.57859−3.105−0.391−0.4680.6330.982
12400.728340.55481−2.813−0.391−0.4690.6771.046
12800.725920.53317−2.215−0.390−0.4700.7251.113
13050.724470.52060−2.139−0.390−0.4700.7571.157
ReferencesSack & Ghiorso (1989)Gasparik (1984, 1990)Ghiorso & Sack (1995)Ghiorso & Sack (1995)
Melt composition Table 4, an. 11: mineral compositions previously reported in Laiolo & Cigolini (2006, table 12)
  • an.=analysis number.